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      1 /*
      2  * Copyright 2014, The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.managedprovisioning;
     18 
     19 import android.app.Activity;
     20 import android.os.Bundle;
     21 import android.webkit.WebView;
     22 import android.webkit.WebViewClient;
     23 
     24 /**
     25  * This activity shows a web view, which loads the {@link #EXTRA_URL} indicated in the starting
     26  * intent. By default the user can click on links and load other urls. However, if the
     27  * {@link EXTRA_ALLOWED_URL_BASE} is set in the starting intent, then only url starting with the
     28  * allowed url base will be loaded.
     29  *
     30  * <p>
     31  * This activity is currently used by the {@link UserConsentDialog} to display the google support
     32  * web page about the Device Owner concept.
     33  * </p>
     34  */
     35 public class WebActivity extends Activity {
     36     public static final String EXTRA_URL = "extra_url";
     37 
     38     // Users can only browse urls starting with the base specified by the following extra.
     39     // If this extra is not used, there are no restrictions on browsable urls.
     40     public static final String EXTRA_ALLOWED_URL_BASE = "extra_allowed_url_base";
     41 
     42     private WebView mWebView;
     43 
     44     @Override
     45     public void onCreate(Bundle savedInstanceState) {
     46         super.onCreate(savedInstanceState);
     47 
     48         mWebView = new WebView(this);
     49         final String extraUrl = getIntent().getStringExtra(EXTRA_URL);
     50         final String extraAllowedUrlBase = getIntent().getStringExtra(EXTRA_ALLOWED_URL_BASE);
     51         if (extraUrl == null) {
     52             ProvisionLogger.loge("No url provided to WebActivity.");
     53             finish();
     54             return;
     55         }
     56         mWebView.loadUrl(extraUrl);
     57         mWebView.setWebViewClient(new WebViewClient() {
     58                 @Override
     59                 public boolean shouldOverrideUrlLoading(WebView view, String url) {
     60                     if (extraAllowedUrlBase != null && url.startsWith(extraAllowedUrlBase)) {
     61                         view.loadUrl(url);
     62                     }
     63                     return true;
     64                 }
     65             });
     66 
     67         this.setContentView(mWebView);
     68     }
     69 }